Should I Get My iPod Replaced? Also Another Problem. Help.

Well my home button wiggles slightly and i can hear it, but only when i move my thumb around on it and actually try to wiggle it. my mom can't feel it. anyways, should this be grounds for getting the device replaced, or should i just learn to live with it?

In short, is a wiggly home button a reason to get the device replaced?

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Oh sorry and another thing. very rarely, when the device is locked and i press the home button, it doesnt work and i have to press it a second time. is that normal? also sometimes when i press the button once to exit an app, it thinks i double pressed it and brings up the app switcher. does that mean that the button is a little messed up? should i get it replaced, or is it no big deal? because it does really bother me a lot.